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%D \module
%D [ file=mp-text.mpii,
%D version=2000.07.10,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=text support,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
%D Under construction.
if known context_text : endinput ; fi ;
boolean context_text ; context_text := true ;
if unknown noftexpictures :
numeric noftexpictures ; noftexpictures := 0 ;
fi ;
if unknown texpictures[1] :
picture texpictures[] ;
fi ;
numeric textextoffset ; textextoffset := 0 ;
% vardef textext@#(expr txt) =
% interim labeloffset := textextoffset ;
% noftexpictures := noftexpictures + 1 ;
% if string txt :
% write "% figure " & decimal charcode & " : " &
% "texpictures[" & decimal noftexpictures & "] := btex " &
% txt & " etex ;" to jobname & ".mpt" ;
% if unknown texpictures[noftexpictures] :
% thelabel@#("unknown",origin)
% else :
% thelabel@#(texpictures[noftexpictures],origin)
% fi
% else :
% thelabel@#(txt,origin)
% fi
% enddef ;
boolean hobbiestextext ; hobbiestextext := false ;
% string textextstring ; textextstring := "" ;
% def resettextextdirective =
% textextstring := "" ;
% enddef ;
% def textextdirective text t =
% textextstring := textextstring & t ;
% enddef ;
vardef textext@#(expr txt) =
save _s_ ; string _s_ ;
interim labeloffset := textextoffset ;
noftexpictures := noftexpictures + 1 ;
if string txt :
if hobbiestextext : % the tex.mp method as fallback (see tex.mp)
write _s_ & "btex " & txt & " etex" to "mptextmp.mp" ;
write EOF to "mptextmp.mp" ;
scantokens "input mptextmp"
else :
write "% figure " & decimal charcode & " : " &
"texpictures[" & decimal noftexpictures & "] := btex " &
txt & " etex ;" to jobname & ".mpt" ;
if unknown texpictures[noftexpictures] :
thelabel@#("unknown",origin)
else :
thelabel@#(texpictures[noftexpictures],origin)
fi
fi
else :
thelabel@#(txt,origin)
fi
enddef ;
string laboff_ ; laboff_ := "" ;
string laboff_c ; laboff_c := "" ;
string laboff_l ; laboff_l := ".lft" ;
string laboff_r ; laboff_r := ".rt" ;
string laboff_b ; laboff_b := ".bot" ;
string laboff_t ; laboff_t := ".top" ;
string laboff_lt ; laboff_lt := ".ulft" ;
string laboff_rt ; laboff_rt := ".urt" ; % bugged, conflict with r
string laboff_lb ; laboff_lb := ".llft" ;
string laboff_rb ; laboff_rb := ".lrt" ;
string laboff_tl ; laboff_tl := ".ulft" ;
string laboff_tr ; laboff_tr := ".urt" ;
string laboff_bl ; laboff_bl := ".llft" ;
string laboff_br ; laboff_br := ".lrt" ;
vardef textextstr(expr s, a) =
save ss ; string ss ;
ss := "laboff_" & a ;
ss := scantokens ss ;
ss := "textext" & ss & "(" & ditto & s & ditto & ")" ;
scantokens ss
enddef ;
pair laboff.origin ; laboff.origin = (0,0) ; % (infinity,infinity) ;
pair laboff.raw ; laboff.raw = (0,0) ; % (infinity,infinity) ;
laboff.origin = (0,0) ; labxf.origin := 0 ; labyf.origin := 0 ;
laboff.raw = (0,0) ; labxf.raw := 0 ; labyf.raw := 0 ;
vardef thelabel@#(expr s, z) =
save p ; picture p ;
p = s if not picture s : infont defaultfont scaled defaultscale fi ;
% wrong, see myway textext
% if laboff@#<>laboff.origin :
(p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p +
labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p)))
% else :
% (p shifted z)
% fi
enddef;
def build_parshape (expr p, offset_or_path, dx, dy,
baselineskip, strutheight, strutdepth, topskip) =
if unknown trace_parshape :
boolean trace_parshape ; trace_parshape := false ;
fi ;
begingroup ;
save q, l, r, line, tt, bb,
n, hsize, vsize, vvsize, voffset, hoffset, width, indent,
ll, lll, rr, rrr, cp, cq, t, b ;
path q, l, r, line, tt, bb ;
numeric n, hsize, vsize, vvsize, voffset, hoffset, width[], indent[] ;
pair ll, lll, rr, rrr, cp, cq, t, b ;
n := 0 ; cp := center p ;
if path offset_or_path :
q := offset_or_path ; cq := center q ;
voffset := dy ;
hoffset := dx ;
else :
q := p ; cq := center q ;
hoffset := offset_or_path + dx ;
voffset := offset_or_path + dy ;
fi ;
hsize := xpart lrcorner q - xpart llcorner q ;
vsize := ypart urcorner q - ypart lrcorner q ;
q := p shifted - cp ;
startsavingdata ;
savedata "\global\parvoffset " & decimal voffset&"bp " ;
savedata "\global\parhoffset " & decimal hoffset&"bp " ;
savedata "\global\parwidth " & decimal hsize&"bp " ;
savedata "\global\parheight " & decimal vsize&"bp " ;
if not path offset_or_path :
q := q xscaled ((hsize-2hoffset)/hsize)
yscaled ((vsize-2voffset)/vsize) ;
fi ;
hsize := xpart lrcorner q - xpart llcorner q ;
vsize := ypart urcorner q - ypart lrcorner q ;
t := (ulcorner q -- urcorner q) intersection_point q ;
b := (llcorner q -- lrcorner q) intersection_point q ;
if xpart directionpoint t of q < 0 :
q := reverse q ;
fi ;
l := q cutbefore t ;
l := l if xpart point 0 of q < 0 : & q fi cutafter b ;
r := q cutbefore b ;
r := r if xpart point 0 of q > 0 : & q fi cutafter t ;
% tt := (ulcorner q -- urcorner q) shifted (0,-topskip) ;
% bb := (llcorner q -- lrcorner q) shifted (0,strutdepth) ;
%
% l := l cutbefore (l intersection_point tt) ;
% l := l cutafter (l intersection_point bb) ;
% r := r cutbefore (r intersection_point bb) ;
% r := r cutafter (r intersection_point tt) ;
if trace_parshape :
drawarrow p withpen pencircle scaled 2pt withcolor red ;
drawarrow l shifted cp withpen pencircle scaled 1pt withcolor green ;
drawarrow r shifted cp withpen pencircle scaled 1pt withcolor blue ;
fi ;
vardef found_point (expr lin, pat, sig) =
pair a, b ;
a := pat intersection_point (lin shifted (0,strutheight)) ;
if intersection_found :
a := a shifted (0,-strutheight) ;
else :
a := pat intersection_point lin ;
fi ;
b := pat intersection_point (lin shifted (0,-strutdepth)) ;
if intersection_found :
if sig :
if xpart b > xpart a : a := b shifted (0,strutdepth) fi ;
else :
if xpart b < xpart a : a := b shifted (0,strutdepth) fi ;
fi ;
fi ;
a
enddef ;
if (strutheight+strutdepth<baselineskip) :
vvsize := vsize ;
else :
vvsize := (vsize div baselineskip) * baselineskip ;
fi ;
for i=topskip step baselineskip until vvsize :
line := (ulcorner q -- urcorner q) shifted (0,-i-eps) ;
ll := found_point(line,l,true ) ;
rr := found_point(line,r,false) ;
if trace_parshape :
fill (ll--rr--rr shifted (0,strutheight)--ll
shifted (0,strutheight)--cycle) shifted cp withcolor .5white ;
fill (ll--rr--rr shifted (0,-strutdepth)--ll
shifted (0,-strutdepth)--cycle) shifted cp withcolor .7white ;
draw ll shifted cp withpen pencircle scaled 2pt ;
draw rr shifted cp withpen pencircle scaled 2pt ;
draw (ll--rr) shifted cp withpen pencircle scaled .5pt ;
fi ;
n := n + 1 ;
indent[n] := abs(xpart ll - xpart llcorner q) ;
width[n] := abs(xpart rr - xpart ll) ;
if (i=strutheight) and (width[n]<baselineskip) :
n := n - 1 ;
savedata "\global\chardef\parfirst=1 " ;
fi ;
endfor ;
savedata "\global\parlines " & decimal n ;
savedata "\global\partoks{ " ;
for i=1 upto n:
savedata decimal indent[i]&"bp " & decimal width[i]&"bp " ;
endfor ;
savedata "}" ;
stopsavingdata ;
endgroup ;
enddef ;
vardef verbatim(expr str) =
ditto & "\detokenize{" & str & "}" & ditto
enddef ;
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